Table 5.

Low (EC10, NOEC) and median (EC50) effect concentrations of PBO for population growth rates across participant labs and generations (F0, F1). Ratios between F0/F1 endpoints are also reported. Values are in μg/L.*, ANOVA analyses were not significant (P > 0.05) so NOEC was the highest tested concentration. <, effects were observed at the lowest tested concentration, thus it was not possible to estimate a proper NOEC.

Lab	F0	F1	F0	F1	F0	F1	Ratio F0/F1
	EC10	EC10	EC50	EC50	NOEC	NOEC	EC10	EC50	NOEC
	Mean ± SE	Mean ± SE	Mean ± SE	Mean ± SE
1	192.7 ± 24.9	198.5 ± 22.5	821 ± 11.3	547.7 ± 37.9	100	100	1	1.5	1
2	329.2 ± 28.3		424.3 ± 18.9	460.4 ± 10.7	200	200		0.9	1
2			484.8 ± 22.7		200	200			1
3	321.9 ± 59.1	258.6 ± 18	494.8 ± 44.1	380.2 ± 73.6	200	200	1.2	1.3	1
4	172.7 ± 16.7		225.4 ± 15.8	172.6 ± 76.2	100	100			1
5	391.5 ± 27.6		535.4 ± 47.2		400	100			4
5	346.5 ± 22.9	159.5 ± 19	492.8 ± 29.3	265.7 ± 19.8	200	50	2.2	1.9	4
6	226.6 ± 25.3		285.1 ± 30.6		200	400*			0.5
7	85.7 ± 17.4	154.3 ± 66.9	220.2 ± 30.5	199.2 ± 6.9	100	100	0.6	1.1	1
8	163.3 ± 10.9	126.6 ± 19	225.36 ± 12.3	280.6 ± 31.5	100	50	1.3	0.8	2
9	173.5 ± 20.2	114.4 ± 34.8	310.9 ± 18.1	326.5 ± 86.9	100	<25	1.5	1	4
10	232.2 ± 29.1	239.3 ± 27.5	394.3 ± 10.7	345.2 ± 20.2	200	200	1	1.1	1
11	104.6 ± 10.9	134.8 ± 17.6	307.4 ± 12.5	247.8 ± 19.7	100	100	0.8	1.2	1
12	93.2 ± 17.8	142.2 ± 25.9	368.6 ± 27	254.8 ± 50.8	100	100	0.7	1.4	1